Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Device for detecting failure in piezoelectric apparatus










Image Number 10 for United States Patent #5376854.

A drive circuit for driving a piezoelectric element includes a transformer having a primary winding connected to a power source and a secondary winding connected to the piezoelectric element, a primary semiconductor element circuit connected to the primary winding for switching the current through the primary winding, and a secondary semiconductor element circuit connected to the secondary winding for switching the current through the secondary winding. A failure detection unit responsive to the potential at a predetermined point of the drive circuit is provided for detecting a failure in the piezoelectric apparatus and outputting a failure detection signal.








 
 
  Recently Added Patents
Method and apparatus for editing a program on an optical disc
Lighting elements
Unsupervised document clustering using latent semantic density analysis
Compounds, compositions and use
Distylium plant named `PIIDIST-II`
Emergency power-off button with proximity alarm
System and method for distributing emergency data messages to public safety answering points in a balanced manner
  Randomly Featured Patents
Gear train in multistage transmission for vehicles
Apparatus for computing two-dimensional discrete Fourier transforms
Air bag inflator
Ink-jet printing module having a cleaning device and a covering device at two sides of the printing platform
Systems and methods for bypassing packet lookups
Process for preparing electrical connecting member
Tool for chip removing machining
N-(Sulfoalkane) amino alkane phosphonic acids and their water-soluble salts
Sugar cane grab
Encoders and methods for encoding digital data with low-density parity check matrix